Stainless Steel Reactor for Biodiesel Production
Nov 14, 2023
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Germany is one of the largest economies in Europe, and the present situation of energy resources mainly includes fossil energy, renewable energy and nuclear energy.
Fossil energy: Germany's fossil energy mainly includes coal, oil and natural gas. Coal used to be the main energy source in Germany, but in recent years, due to the consideration of environmental protection and climate change, Germany has gradually reduced the use of coal, and plans to stop coal power generation by 2038. Oil and natural gas are mainly used in transportation and industry.
Renewable energy: Germany is in a leading position in renewable energy, especially in wind and solar energy. The German government actively promotes the development of renewable energy, and has formulated abundant subsidy policies and regulations to support the development of renewable energy. Wind energy and solar energy have become important sources of electricity in Germany, accounting for a considerable proportion of German electricity production.
Nuclear energy: Germany has long relied on nuclear energy as an important source of clean energy, but after the Fukushima nuclear accident, the German government made a decision to gradually give up nuclear energy, and planned to close all nuclear power plants by 2022 and increase the proportion of renewable energy.
According to the current energy situation in Germany, the methods for producing biodiesel mainly include the following.
Oil pressing: Oil crops (such as rapeseed, soybean, palm, etc.) are pressed to extract vegetable oil, and then the vegetable oil is converted into biodiesel through esterification. This is a common biodiesel production method, which can use crops or oil plants to produce biodiesel.
Esterification reaction: Methanol or ethanol is used to carry out esterification reaction with vegetable oil to convert vegetable oil into biodiesel. This is a common biodiesel production technology, which can be realized by different catalysts and process conditions.
Fatty alcohol conversion: Vegetable oil or animal fat is converted into fatty alcohol, and then the fatty alcohol is converted into biodiesel through catalytic reaction. This method usually requires hydrogenation of vegetable oil or animal fat to generate fatty alcohol, and then esterification to obtain biodiesel.
Microalgae biomass conversion: Using microalgae and other biomass raw materials to produce biodiesel. Microalgae have high growth rate and high oil content, and can be used as raw materials for biodiesel.
Requirements from our customer
Temperature: 60°C-130°C
Reaction: Alkaline reaction, vegetable fat, sodium hydroxide or potassium hydroxide, methanol etc.
Solution1: Jacketed Glass Reactor
Problem: The solution under alkaline conditions is often corrosive, which will corrode the material of glass jacketed reactor, leading to the damage and leakage of the reactor. Certain alkaline reactions must be conducted at elevated temperatures; however, glass has a low temperature resistance, making it susceptible to thermal expansion and thermal shock breaking in high-temperature, alkaline environments. In an alkaline environment, glass will become more brittle and more easily broken.
Conclusion: Glass jacketed reactor can not be used for alkaline reaction.
Solution2: Stainless Steel Reactor
Advantage: Stainless steel has good corrosion resistance and can resist the corrosion of alkaline solution, so it is suitable for alkaline reaction. Stainless steel material can withstand high temperature in a certain range, and is suitable for alkaline reaction at high temperature without deformation or damage. Stainless steel has high strength and toughness, and can withstand the pressure and impact in the reaction process to ensure the safety of the reaction process.
Stainless steel is advantageous for cleaning and reusing after reaction because of its smooth surface, ease of cleaning, and difficulty in attaching impurities.
Conclusion: Due to the corrosion resistance and durability of stainless steel, stainless steel reaction kettle usually has a long service life, and can repeatedly carry out alkaline reaction without being damaged.
The Quotation from ACHIEVE CHEM as Follow
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Concerns in the synthesis of biodiesel using a stainless steel reaction kettle
1. Cleaning and disinfection: Before production, the reaction kettle must be strictly cleaned and disinfected to ensure the quality and safety of biodiesel.
2. Quality of raw materials: The raw materials used to produce biodiesel must meet the quality standards, including fatty glycerides and methanol.
3. Heating and stirring: During the reaction, heating and stirring are needed to promote the chemical reaction. To avoid damaging the reaction kettle, the heating speed shouldn't be set too quickly.
4. Temperature control: The temperature in the reaction process must be accurately controlled to avoid by-products. Either too high or too low temperature may lead to product quality degradation.
5. Feeding sequence: When adding raw materials, it is necessary to feed in a certain order to avoid affecting the reaction.
6. Gas emission: During the reaction, gas may be generated, which needs to be discharged in time to avoid affecting the service life of the reaction kettle.
7. Prevention of oxidation: Oxidation reaction will occur during the reaction of biodiesel, and measures should be taken to prevent oxidation, such as adding antioxidants or maintaining an inert atmosphere.
8. Safety measures: Pay attention to safety during production, including wearing protective clothing and avoiding contact with chemical reagents.
9. Cleaning and maintenance: Before and after each use, thoroughly clean and disinfect the stainless steel reaction kettle to avoid cross-contamination. Check and maintain the seals, stirrers and other components of the reaction kettle regularly to ensure their normal operation.